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Old 01-04-2003, 04:49   #1 (permalink)
longjohn1
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Question any clue

lust couple off days my xr6 has been making clunking noises again, it only happens when thier is weight in the back ie. kids, full or half tank of petrol, i have had three diffs in it i don't think it is the diff as soon as their their is no kids or full tank of petrol she turns into a rocket no clunking and downshifts beautiful it is going into REPCO on tuesday for new oil and additive added to diff any help would be great.?
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Old 01-04-2003, 09:54   #2 (permalink)
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Check shock rubbers and suspention bush's.. Drive shaft uni's ??
Exhaust or something similar not hitting on suspention ??
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Old 01-04-2003, 14:54   #3 (permalink)
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i should find out on tuesday i am about to fill my car up and go for a drive a have a good listen.
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Old 01-04-2003, 16:50   #4 (permalink)
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drove me f___g mad. i had a clunking noise in the backof the car, couldnt hear it if i shook and bounced the car, but very loud when driving. eventually shut my mate in the boot and went for a drive, BINGO one of the tiny screws that hold the stacker had fallen out and was tapping on the parcel shelf.
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Old 01-04-2003, 17:13   #5 (permalink)
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Mate,

Check that you have still got shock spacers on the shaft of your shocks. Is your car lowered to a degree?

I had that knocking sound as well, and if you get up under your car where the rear uni-joint spins, have a look above that on the tunnel and see if thats what the noise is. When my car had ppl in the back or lots of fuel or I hammered the throttle the ass end would sink too low and the uni-joint would carve a nice groove in the tunnel.

Check that first, if there are grooves then thats the problem.
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Old 01-04-2003, 21:27   #6 (permalink)
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I assume car is auto/IRS? Weight can cause two problems. Downforce which lowers the car, causing clearance problems for the exhaust, etc. The other is increased load, whereby the torque rock of the engine may increase and cause the exhaust to foul against things to the side of it, not just above where you would normally look.
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Old 01-04-2003, 21:27   #7 (permalink)
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I had this problem in my old XF. I had a canary at the time, so the guy at the license centre told me I had to get it fixed.

It turned out that it was the shock bolts were a little loose, so i had to tighten them up.

And with you saying you've had 3 diffs in it, maybe it hasn't been tightened(or re-tightened) properly. You need to make sure that the weight of the car is on it as you tighten it.

Good luck!
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Old 01-05-2003, 23:36   #8 (permalink)
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put a full tank off fuel in it was running find until i decide to pull the hand brake to hard mmm.the noise is back, when it first happen i was at in laws for new years parked on side of hill and park brake not working as usal pulled it right up to make sure it would not roll,anyway bang it started.
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Old 01-07-2003, 01:41   #9 (permalink)
longjohn1
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any one got strange problems with rear of your ford get the oil changed and get a addivite added,you can buy of the shelf for $10 ,any difference you bet best $69 i have ever spent.
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